Stretchable origami robotic arm with omnidirectional bending and twisting.

Area of Science:

• Robotics
• Biomimetics
• Materials Science

Background:

• Octopus arms exhibit remarkable embodied intelligence and dexterity.
• Existing robotic systems often lack the multimodal deformation capabilities seen in biological systems.

Purpose of the Study:

• To introduce magnetically controlled origami robotic arms based on Kresling patterns.
• To achieve multimodal deformations including stretching, folding, omnidirectional bending, and twisting.
• To mimic the complex motions and grasping capabilities of octopus arms.

Main Methods:

• Utilizing Kresling patterns for reconfigurable origami structures.
• Employing precise magnetic actuation for controllable bistable deploying/folding and omnidirectional bending.
• Investigating single- and multiple-unit robotic systems, including scalable Kresling assemblies.

Main Results:

• Demonstrated controllable bistable deploying/folding and omnidirectional bending via magnetic actuation.
• Developed Kresling assemblies with increasing numbers of units to achieve enhanced bending and stretchability.
• Showcased sophisticated motions like continuous stretching, reconfigurable bending, and multiaxis twisting in multi-unit systems.

Conclusions:

• Kresling robotic arms offer a novel mechanism for synergistic robotic motions in constrained environments.
• The noncontact actuation enables applications in navigation, sensing, and object interaction.
• Potential for miniaturized medical devices, such as catheters, for procedures like endoscopy and intubation.